just thought i would share with yall what a local shop has going on. i follow them on youtube and seen this build they currently have going on, 4 dd9518s in a 6th order bandpass going into a chevy dually, each sub hacing its own ddm3. from what i can tell, 7 xs batteries and 3 mechman 400amp alts, looks sick. they normally update stuff until its done so hopefully we can see the finished product soon